Several reasons why the keyboard does not work on the computer

A person who suddenly discovered that he had ceasedwork the keyboard on the computer, few would envy. And, as is often the case, similar troubles most often occur precisely when the report is “on fire”, a graduation project is being recruited, during a battle for the fate of the world in a regular computer game, etc.

С другой стороны, вопрос «почему не работает The keyboard on the computer ”is not set too often, since with the beginning of the“ USB era ”many“ childhood diseases ”in this area of ​​computing devices are a thing of the past. In light of this, a broken keyboard is a reason for pride in its “luck”.

Connectivity

In all modern keyboards to connect withThe motherboard uses a USB serial interface. Before the discontinued PS2 standard, it has a number of advantages, among which we can especially note the possibility of “hot swapping”. That is, the user can theoretically, with the system unit turned on, plug in and unplug the USB plug into the appropriate free connector. And many use it, especially owners of portable computers. In this case, two negative points. First, it was noticed that frequent switching of the device leads to the fact that the spring-loaded contacts in the plug lose their elasticity, as a result of which their working capacity is broken (the power or data line disappears).

Неудивительно, что за этим следует вопрос «почему The keyboard does not work on the computer. " Thus, with frequent connection, the plug wears out and requires replacement. Secondly, sometimes during hot-swappable device it failed, therefore this possibility should not be misused. To check the contacts, you need to turn off the computer, unplug the keyboard plug and gently connect it again, gently shaking in the connector. Sometimes contacts can be returned with a needle to the former spring-loaded state.

Electrical problems

Like any other USB device, the keyboardreceives power directly from the port. And since the features of the internal implementation of the bus are such that several connectors are connected to the same control chip at once, with the inclusion of powerful devices (with a current of 500 mA) their performance is not guaranteed. The solution is simple: if the question “why the keyboard on the computer does not work” arose, then you need to disconnect all USB devices, except the most necessary ones, and check the functionality.

With large quantities at the same timeUSB-enabled peripherals need to use an intermediate splitter with an external source. Also, quite often the problem with USB is observed in old computers and laptops, power supplies and other elements of which have expired and do not provide the required voltages. The solution is similar to the above. And, of course, you should not forget that the fault may be in the connector itself: to check, you must plug the plug into another USB port.

Software crash

Modern operating systems forKeyboard interactions use a driver control program. Sometimes it stops working correctly. As a result, the user can not understand why the keyboard does not work on the computer. It is necessary with the help of the mouse to go to the "Device Manager" and try to update the driver in the item "Keyboards". If it does not help, then you need to remove the device, remove the driver with the appropriate command and reconnect the keyboard to the computer - the Plug & Play mechanism should work.

Casus settings

In modern BIOS motherboards there is a pointallowing to refuse use of USB, having exposed the Disable mode. If for some reason this happened, then you need to find the old PS / 2 keyboard, use it to go into the BIOS (Del button immediately after power-up) and enable USB. Another option is to reset the settings to the initial state by closing the corresponding Clear CMOS jumper on the board (its exact location is indicated in the instructions). Newbies sometimes face the fact that the keyboard on the right does not work. This can be caused by accidentally pressing the NumLock button to toggle the modes of the right digital unit. If the indicator of the same name is on, then it is necessary to switch it to another state by pressing the button again.